Ok I can predict the first couple of answers: "the battery is lithium no it's safe to leave it plugged in" but hear me out. I NEVER leave my 5 charging overnight for fear of hurting it, but i decided to last night because I was playing an internet game that required me to have the internet page for it open to progress, so to get some more currency on it I left the page up on Google Chrome, not safari, all night and left it plugged up so it wouldnt die on me overnight. Then today, my phone started at 100% and died on me fairly quickly which NEVER happens to me, and I hardly used it too. And when I got home and charged it i watched a short video, this time on safari, and I LOST battery percentage even though it was plugged into the wall charger. I've narrowed it down to either me recently downloading Google Chrome (froze on me today so i deleted it and problems seem to have stopped) or the fact that I left my phone plugged up. Which is it?